Lens-shielding attachment for cameras.



B. M. TAKAHASHI.

LENS SHIELDING ATTACHMENT FOR GAMERAS.

APPLICATIDN FILED MAY 20, 191B. 1

Patented Nov. 5, 1918.

ZZU'HVVENTOR ATTORNEYS /4 min BENJAMIN M. TAKAHASHI, OF HARLOWTON,MONTANA.

LENS-SHIELDING ATTACHMENT FOR CAMERAS.

Specification of Letters Patent.

Patented Nov. 5, 1918.

Application filed May 20, 1918. Serial No. 235,665.

To all whom it may concern:

Be it known that I, BENJAMIN M. TAKA- HASHI, a subject of the Emperor ofJapan, and a resident of Harlowton, in the county of Wheatland and Stateof Montana, have made certain new and useful Improvements inLens-Shielding Attachments for Cameras, of which thefollowing is aspecification.

My presentinvention relates generally to cameras, and particularly tocertain improvements in lens shielding attachments therefor inconnection with the device described and claimed in my Patent 1,262,137granted April 9, 1918, the primary object of my present improvementsbeing the provision of a lens shielding attachment by means of which alens may be conveniently shielded either with or without a ray filter,and the latter conveniently carried and carefully protected in use.

In the accompanying drawing illustrating my present improvements Figure1 is a side view of the attachment; 7

Fig. 2 is a sectional View therethrough with the shielding disk andfilter cover open;

Fig. 3 is a similar View with the shielding disk and filter coverclosed; a

Fig. 4. is a horizontal section taken substantially on line 77 of Fig.3.

Referring now to these figures, the lens shield of my present inventionas in my patent above referred to, is in the form of a shielding disk 10which is hinged at one point to an adjusting ring 11, having an innerannular groove receiving the annular rib 12 at one end of a cylindricalholder 13, the opposite end of which has an annular series oflongitudinal slots 11, whereby to adapt the same to telescope upon andfrictionally engage the lens barrel of a camera of any suitable type.

The lens shielding disk 10, which is opaque and has its annular edgeprovided with a rounded flange 15, is thus adapted for movement upon itshinge 16 from the position at right angles to the axis of thecylindrical holder 13, and as seen Fig. 3, to a position more or lessparallel to the axis of theoylindrical holder, as seen in Fig. 2, thelatter being the operative position wherein the disk 10 will operate tointercept glaring light reflections and the like which would otherwisedistribute themselves unevenly upon a film or plate to the detriment ofthe photographed image or scene. a

In its position as shown in Fig. 3, which is the position of disuse, thedisk 10 operates to entirely close the outer end of thecylindricalholder 13, so that it prevents the entrance ofdust, dirt, moisture andthe like, the adjusting ring 11 having an extending lip 17 at a pointdiametrically opposite the hinge 16, and for engagement with the flangededge of the disk 10 to hold the latter in closed position. The flangededge of the disk 10 is also provided with a finger piece 18, by which itmay be conveniently released from the clamping lip 17 when it is to beopened for use.

The wall of the adjusting ring 11 outwardly beyond the cylindricalholder 18, has an intermediate annular rib 19 within which a ray filterin the form of a filtering disk 20 may be seated, this filter being ofany suitable material and color for the particular purpose for which itis to be used.

An apertured cover plate 21 having an annular flanged edge 22 and ofreduced diameter as compared to that of the shielding disk 10 is hingedat 23 upon the outer portion of the adjusting ring 11 adjacent to thehinge 16, of the disk 10, the diameter of this plate being such that itsflanged edge will clasp around the rib 19 in the closed position shownin Fig. 3, so as to thereby engage a portion of the outer surface of theray filter 20, and eflectively support the latter against the outer faceof the adjusting ring.

It will be noted from Fig. 3 in particular that the opening 24: of disk21 is of a diameter substantially the same as the inner diameter of theouter portion of the adjusting ring.

Thus by the use of my improved shielding attachment the extreme highlights, seashore reflections, and the like may be cut off through theuse of the shielding disk 10 either with or without a ray filter 20, thelatter of which is, when used, held firmly in position by the coverplate 21; in such manner, however, that it may be readily removed forthe substitution of a filter more or less dense, or one of a differentcolor.

It is obvious that by virtue of the annular adjustment of the ring 11,with respect to the cylindrical support 13 engaging the lens barrel, theshielding disk 10 may be annularly adjusted with respect to the lensbarrel so as to intercept rays in no matter which direction they mayapproach.

I claim 1. A device of the character described consisting ofacylindricalholder for telescoping engagement upon a lens'barreLan annularly adustable ring carried by the holder having means for detachably suportinga ray filter, and a lens shielding disk hinged to the said ring andactin as a cover for the same. and the filter hol ingmeans when inclosed position.

2. A device of the character described including a holder, an annularlyadjustable ring carried'by the holder, a lens shieldin disk hinged tothe outer portion of the sai ring to open and close w th respectthereto,

and a ray filter detachably su orted by the d disk in the rmg andcovered by the sa1 closed position of the'latter.

3. A device of the character described including .a holder, an annularlyadjustable rin carried by the holder and provided wit an annular ribforming a support for a ra filter, an a ertured cover plate hinged to: te ring an movable into and out of clasping engagement with'the said rib,and

ing disk also hinged 'to'the adto close and open with respect forming acover. for the my a lens shiel justing rin thereto an filter and closed.

4. A device of the character described including a vcylindrical support,a lens shield adjustable around the sup ort'and hinged to open andclose, and lter supporting "means adjacent the holder and normallycovered by the shielding disk in the closed position of the latter.

BENJAMIN M. TAKAHASHI. Witnesses for signature:

W.'A. LYNN, M. E. Rowmnns.

the cover plate thereof when

